下列主题表达方式正确的是()
A.降低竖炉齿滚故障时间
B.耐磨板研磨作业改善
C.减少布袋箱体检修时间
D.缩短冷筛故障时间
参考答案:A, B, C, D
The new model ________ the market in three months, all the shops are now selling the old model at a discount.
A.hitting
B.hit
C.having hit
D.to hit
扁桃体周间隙位于什么之间。()
A.扁桃体被膜与咽上缩肌
B.扁桃体被膜与咽中缩肌
C.扁桃体被膜与咽下缩肌
D.扁桃体被膜与腭咽肌
E.以上都不是